Sheriff Joe Arpaio (L) of Maricopa County, Arizona listens as Republican presidential candidate Donald Trump speaks to the press prior to a rally on January 26, 2016 in Marshalltown, Iowa. Arpaio today announced his support for Trump's...More

Sheriff Joe Arpaio (L) of Maricopa County, Arizona listens as Republican...Sheriff Joe Arpaio (L) of Maricopa County, Arizona listens as Republican presidential candidate Donald Trump speaks to the press prior to a rally on January 26, 2016 in Marshalltown, Iowa. Arpaio today announced his support for Trump's presidential bid.LessMore

Republican presidential candidate Donald Trump speaks at a rally on January 26, 2016 in Marshalltown, Iowa. Sheriff Joe Arpaio, the anti-immigration sheriff from Maricopa County, Arizona, today announced his support for Trump's...More

Republican presidential candidate Donald Trump speaks at a rally on January 26,...Republican presidential candidate Donald Trump speaks at a rally on January 26, 2016 in Marshalltown, Iowa. Sheriff Joe Arpaio, the anti-immigration sheriff from Maricopa County, Arizona, today announced his support for Trump's presidential bid.LessMore

Republican presidential candidate Donald Trump speaks to the press prior to a rally on January 26, 2016 in Marshalltown, Iowa. Sheriff Joe Arpaio, the anti-immigration sheriff from Maricopa County, Arizona, today announced his support...More

Republican presidential candidate Donald Trump speaks to the press prior to a rally...Republican presidential candidate Donald Trump speaks to the press prior to a rally on January 26, 2016 in Marshalltown, Iowa. Sheriff Joe Arpaio, the anti-immigration sheriff from Maricopa County, Arizona, today announced his support for Trump's presidential bid.LessMore

People wait for the arrival of Republican presidential candidate Donald Trump during his campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential...More

People wait for the arrival of Republican presidential candidate Donald Trump...People wait for the arrival of Republican presidential candidate Donald Trump during his campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore

Republican presidential candidate Donald Trump holds a picture of himself after being given it as he greets people during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to...More

Republican presidential candidate Donald Trump holds a picture of himself after...Republican presidential candidate Donald Trump holds a picture of himself after being given it as he greets people during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore

Republican presidential candidate Donald Trump greets people during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.

Republican presidential candidate Donald Trump greets people during a campaign...Republican presidential candidate Donald Trump greets people during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore

People reach out to greet Republican presidential candidate Donald Trump during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.

People reach out to greet Republican presidential candidate Donald Trump during a...People reach out to greet Republican presidential candidate Donald Trump during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore

Republican presidential candidate Donald Trump greets people during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.

Republican presidential candidate Donald Trump greets people during a campaign...Republican presidential candidate Donald Trump greets people during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore

Protesters are escorted out after interrupting a Republican presidential candidate Donald Trump campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican...More

Protesters are escorted out after interrupting a Republican presidential candidate...Protesters are escorted out after interrupting a Republican presidential candidate Donald Trump campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore

People listen as Republican presidential candidate Donald Trump speaks during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.

People listen as Republican presidential candidate Donald Trump speaks during a...People listen as Republican presidential candidate Donald Trump speaks during a campaign event at the University of Iowa on January 26, 2016 in Iowa City, Iowa. Trump continues his quest to become the Republican presidential nominee.LessMore